Baton Rouge motorists might notice a few extra cars on the road Friday, but this time the extra traffic will offer a sight of vintage wheels. The annual Great Race will wind through the Capital City on the way to the finish line in Mobile, Ala., as drivers take their vintage cars out on a 2,100 mile scenic drive.

The 2013 edition of the Great Race pits nearly 100 teams of two against each other with the chance to win up to $50,000, but the race isn't about speed. It's about accuracy.

The team of two is comprised of a navigator and a driver, though both can switch places whenever necessary. Along the day's planned route, the team must check into between four and seven points, but those points have specific times at which the team is expected. For every second the team is too early to too late to the checkpoint, a deduction is taken from the team's overall score.

No GPS equipment is allowed, and the car's odometer is blacked out for the race. Driver and navigator instead track their route via a list of detailed turn-by-turn directions.

"The format is much more demanding than a flat-out cross-country race," according to the Great Race website. "This is a test of human mental agility and endurance as well as classic car endurance."

Cars used in the race must be no newer than 1969, which means the classics are on display. In 2011, a 1911 Velie won the grand prize, and this year's oldest vehicle is a 1913 Premier.